The process principle of film blowing machine

Add dry polyethylene particles into the lower hopper, and enter the screw from the hopper by the weight of the particles themselves. When the pellets come into contact with the threaded bevel, the rotating bevel faces the plastic and generates a thrust perpendicular to the bevel face, pushing the plastic particles away. Pushing forward, during the pushing process, due to the friction between the plastic and the screw, the plastic and the barrel, the collision and friction between the particles, and also due to the external heating of the barrel, it gradually melts. The molten plastic is filtered by the machine head to remove impurities and comes out of the die mouth. It is cooled by the air ring and blown through the herringbone plate, the traction roller, and the finished film is rolled into a cylinder.